what company name would be the correct layout?

[David Rowland]

is the business a person’s name?

e.g. John Smith – Building Contractor or Smith & Co – Building Contractors.
Or even Lozengers – Building Contractors

[Gordon Forbes]

Not really R & B Joinery Limited

[David Rowland]

ah…
but two in the title so I guess they are both contractorS

R & B Joinery Limited
Registered Building Contractors

[Gordon Forbes]

Thanks dave done one already with the plural.

[Martin Oxenham]

We always use Contractors as this sounds more professional and not a one man band.